Valve-grinder.



G. K. CARLSON.

VALVE GRINDER.

APPLICATION FILED DEC.12, :914.

Llgi Patented Apr. 6, 1915.

i GEORGE K. CAELSON, OF NEW YORK, N. Y.

VALVE-GRINDER.

Specification of Letters Patent.

Patented Apr, 6, @3151,

Application filed December 12, 1914. Serial No. 878,868.

To all whom it may concern:

Be it known that I, GEORGE K. CARLsoN, a subject of the Emperor of Russia, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements ,in Valve-Grinders, of which the followingis a specification, reference being had therein to the accompanying drawing.

This invention relates to valve grinders designed more particularly for grinding the valves of internal combustion engines such as are universally employed in motor vehicles, the object of the invention being to produce a portable device, simple in construction, compact in form and effective in operation, and which may be manufactured at little expense.

With these ends in view my invention consists in the combination with a frame or stock, of a spiral member mounted for oscillation therein and adapted to be operatively engaged with the valve to be ground, a reciprocating device guided by th frame or stock and engaging the spiral member to oscillate it, andan operating member sustained by the frame or stock and connected with the reciprocating device for imparting a reciprocating movement thereto.

the frame 'or stock is of tubular form and provided at one end with a pressure handle,- is in the form of a and the spiral member spirally formed shaft which extends 'longh tudinally within the stock and is journaled at its opposite ends in suitable bearings in the stock, the reciprocating device being-in the form of a slide with opposing shoes which enter the spirals of the shaft at opposite sides, andwhich slide is connected by means of links, to a vibratory operating handle pivoted to the stock. The spiral shaft has connected with it, a stem formed at its extremity to be interlocked or otherwise operatively engaged with the valve to be ground; whereby by the vibratory movement of the operating lever, the stem will be caused to oscillate, and will impart a corresponding movement to the valve, therequisite pressure being applied to hold the valve in proper frictional contact with its seat, by

means of the pressure handle on the upper end of the stock.

In the accompanying drawings, I have shown my invention in one" form of embodiment by way of example, and incl ud-' In the I more specific embodiment of the invention,

conditions encountered. in practice.

ing the detailed features above enumerated, but it will be understood that the detailed construction may be variously modified without departing from the limits of the invention; and further it will be understood that the invention is not limited to any particular form-or construction of the parts except in so far as such limitations are specilied in the claims.

In the accompanying drawings: Figure l is a side elevation of my improved device. Fig. 2 is a longitudinal sectional. elevation through the same on the line ao of Fig. 1. Fig. 3 is a horizontal sectional plan. view on the line b--b of Figs. 1 and 2.

Referring to thedrawings, my improved gaging the spiral of the shaft at opposite sides, and an operating member f sustained by the stock and connected with the reciprocating device in such manner that by the vibratory movements of the operating memher, the reciprocating device will be moved longitudinally back and forth, and engaging the spiral member, will cause the same to oscillate within theframe.

The stock. or frame is preferably of tubular form and consists of a main section 5 and an extensible section 6 which is telescoped in the upper end of the main section and is clamped adjustably therein by means of a. bolt 7 extending through the main section and through longitudinal slots 8 in the extensible section, whereby the length-overall, of the frame may be varied to meet the lhe extensible section has fixed to it pressure handle in the form ofa head 9 fixed to the end of said section, the purpose of which will presently appear.

lhe spiral member is in the form of a spirally grooved shaft which extends longitudinally within the lower end of the main section 5 of the stock, being mounted at its upper end in a central bearing in a block 10 fixed within the stock, and being mounted at its opposite end in a bearing in a block 11 fixed in the lower end of the stock. T he reciprocating device 3 before alluded to as being in the form of a slide with opposing shoes, is substantially circular in form to it and slide within the tubular stock, and is provided with an open slot which embraces llil the spiral shaft and the sides of which slot are shaped to form the opposing shoes 3 which engage the spiral site sides.\. The slide is guided in the tubular stock by means of lugs 3 projecting outwardly from its opposite sides and extending through longitudinal slots 5 in the opposite sides of the stock. The operating member 4 is in the form of a lever provided at its inner end with forked parallel arms 13 which extend at .opposite sides of the stock above the bearing block 10, at which point the arms are pivoted to the stock on a transverse axis as at 13 so that the lever may be vibrated up and down. The arms 13 are connected with the slide by means of two links 14, the lower ends of which are pivoted to the lugs 3 while their upper ends are pivoted to the said arms. As a result of this construction and arrangement of the parts, when the operating lever is vibrated up and down, the slide will be reciprocated back and forth, and engaging the spiral shaft it will cause the same to oscillate back and forth. The lower end of the spiral shaft is extended outwardly through the bearingblock 11 and has connected with it a stem 15, the lower end of which is formed so as to be operatively connected with the valve to be ground, the end of the stem in the present instance being flattened so as to enter the slot which is usually formed in the valves of internal combustion engines.

In the use of the device, the spring, which is usually applied to the valves of internal combustion engines and which normally tends to hold the valve yieldingly on its seat is removed, and a light spring is substituted which is seated around the valve stem and bears against the under side of the valve so that it will tend to lift the same off its seat, the use of this substitute spring being temporary and merely to facilitate the grinding operation. The valve grinder is now engaged with the valve by inserting the widened end of its stem 15 in the slot in the valve, or by otherwise effecting operative connection between the stem 15 and thevalve. A suitable abrasive material is next applied between the valve and valve seat, and with the grinding device held in the position described, and ing applied to the same by means of the pressure handle 9 so as to hold the valve against its seat, the operating lever 4 is vibrated up and down, with the result that the spiral shaft will be oscillated back and forth,

thereby imparting a corresponding motion Copies of this patent may be obtained for five cents each, by addressing the to the stem 15, which of the shaft at oppowith its seat.

the proper pressure beinturn will impart a like motion to the valve, thereby causing the same to oscillate back and forth in contact This operation is continued until all the irregularities in the cooperating surfaces have been removed and the contacting parts of the valve and seat are perfectly smooth and regular.

' The device as a whole, possessing the above described features of construction and characteristics, is portable in character, simple in construction and compact in form, and may be conveniently applied to the valves and operated to speedily grind the parts and bring them to proper operative condition.

Having thus described my invention, what I claim is:

1. In a valve grinder, the combinationof a frame, a spiral member mounted for oscillation therein and adapted to be operatively engaged with the Valve to-be' ground, a re ciprocating device engaging said spiral member, a hand lever pivoted at its inner end to the frame to swing up and down, and a link jointed at one end to the lever at a point between the ends of the latter, and jointed at its other end to said reciprocating device.

2. In a valve grinder, a stock, a spiral member mounted for oscillation therein and adapted to be operatively the combination of engaged with the valve to be ground, a ,re'

an operating lever provided at its therein, a spiral member journaled in bearings in said blocks for oscillation and adapted to be operatively. engagedwith the valve to be ground, a reciprocating device in the form of a slide engaging said spiral member and provided with lugs extending through said slots, and an operatingmember sus- {aimed by the stock and connected with said ugs.

In testimony whereof, I have aflixed my signature in presence of two witnesses. v v GEORGE K. CARLSON. Witnesses:

M. D, BARRY, HUBERT J. GEENEN.

Commissioner of Patents,

Washington, D; 0. 

